182 OETHOPTERA. 



cloud near tlie middle of the hind margin, and a black line 

 on the front margin ; hind thighs pale, with two large black 

 spots on the inside ; hind shanks brown, with darker spines, 

 and a broad whitish ring below the knees. Length | inch ; 

 exp. above 1^ inch. 



This somewhat resembles the clouded locust, from which, 

 however, it is easily distinguished by its much shorter anten- 

 nas and the dusky cloud on the hinder margin of the wings. 

 I have captured it in pastures, in the perfect state, from the 

 middle of May to near the end of July. I believe that it has 

 never been described before. 



11. Locusta (Tragocephala) viridi-fasciata. Green-striped Locust. 

 (Plate III. Fig. 2.) 



Green ; thorax keeled above ; wing-covers with a broad 

 green stripe on the outer margin extending from the base 

 beyond the middle and including two small dusky spots on 

 the edge, the remainder dusky but semi-transparent at the 

 end ; wings transparent, very pale greenish yellow next to 

 the body, with a large dusky cloud near the middle of the 

 hind margin, and a black line on the front margin ; antennae, 

 fore and middle legs reddish; hind thighs green, with two 

 black spots in the ftirrow beneath; hind shanks blue-gray, 

 with a broad whitish ring below the knees, and the spines 

 whitish, tipped with black. Length about 1 incli ; exp. from 

 more than If to nearly 2 inches. 



This insect is the Acrydium viridi-fasciatum of De Geer, 

 who was the first describer of it, the Gryllus Virginianus of 

 Fabricius, the Gryllus Locusta chrysomelas of Gmelin, the 

 Acrydium marginatum of Olivier, and the Acridium hemipte- 

 rum of Palisot de Beauvois. It is remarkable that a species 

 so strongly marked as this is should have been so profiisely 

 named. Palisot de Beauvois seems to have selected the most 

 appropriate name for it ; for the green portion of the wino-- 

 covers is thick and opaque, and the dusky portion thin and 

 semi-transparent, as in the wing-covers of Hemipterous in- 



